Guard for paper indicated dobbies



April 27, 1943. R, Q TURNER 2,317,564

Gum Fon PAPER INDIcATED DOBBIEs Filed Sept. 14, 1942 ATTQRNEY PatentedApr. 27, 1943 UNITED STATES PATE OFFCE GUARD FOR PAPER INDICATED DOBBIESApplication September 14, 1942, Serial No. 458,219

14 Claims.

This invention relates to loom dobbles of the kind employing a paperpattern and it is the general object of the invention to provide simplemeans for disabling certain of the pattern readers when a narrow paperpattern is to be used.

In my co-pending application Serial No. 402,080, now Patent No.2,305,328, I have shown a loom dobby employing a set of pattern readersto be moved toward and from a paper pattern. Those readers which passthrough. perforations in the paper lift the corresponding hooks to placethem in the path of the lifter knife, while the readers which engageunperforated portions of the paper have their springs depressed andtheir corresponding hooks remain out of the path of the lifter knife.When a pattern requiring the full capacity of the dobby is used all ofthe pattern readers are employed, but it not infrequently happens that apart only of the full capacity of the dobby is needed, in which case itis desirable to employ a narrower paper pattern. Under thesecircumstances the pattern readers which are out of alignment with thepaper pattern should be disabled so that they will not communicateuseless lifting forces to their hooks. It is an important object of mypresent invention to provide simple means to be applied to the'carriagefor the readers to hold such of the latter as are not needed in inactive5 position.

1t is a further object of my invention to provide a guard which ispositioned and held to the carriage to move with the latter by theunneeded readers when a narrow paper pattern is to be used.

A dobby of the type set forth in my previously mentioned application canbe used with a leveler which depresses all of the pattern readers whenit is desired to insert a new sheet pattern. It is a further object ofmy invention to provide a guard the application of which to the carriageis facilitated by depression of all of the pattern readers by theleveler.

With these and other objects in view which will appear as thedescription proceeds, my inu vention resides in the combination andarrangement of parts hereinafter described and set forth.

In the accompanying drawing, wherein a convenient embodiment of myinvention is set forth;

Fig. l is a diagrammatic side elevation of those portions of a dobby towhich my invention more particularly relates,

Fig. 2 is a vertical section on an enlarged scale on line 2 2 of Fig. 1,

Figs. 3 and 4 are views similar to Fig. 2 but showing, respectively, themanner in which the guard is applied to the carriage and thenal positionwhich it occupies to disable the unneeded pattern readers,

Figs. 5 and 6 are horizontal sections on lines 5 5 and 6 6 of Fig. 4,and

Fig. 7 is a perspective view of the guard.

Referring particularly to Fig. 1, I have shown only those portions of apaper indicated dobby with which my present invention is moreparticularly concerned. The dobby frame i has right and left anglebrackets II and I2l respectively, to the underside of which is securedtwo vertically spaced guide plates I3 between which the sheet pattern Ppasses. Hook lifter wires lead upwardly from the top plate I3 to thehooks not shown to determine their position with respect to lifterknives not shown.

Secured to the left angle bracket i2 is a depending rod or post l5 whichguides an actuator I6 the left end of which as seen in Fig. 1 is raisedand lowered by a cam I1 having high and low dwells EB and I9,respectively, connected by inclines 2B. The cam is mounted on the shaft2I conveniently supported in any approved manner on the dobby frame anddriven to give the cam a complete rotation for each reading operation ofthe dobby. When the dobby is of the socalled double index type shaft 2iwill make a rotation every second pick of the loom. An arm 25 on theactuator I5 carries a lever 26 pivoted therein at 21. Lever 26 has asubstantially horizontal arm 23 which engages the lower end of the postl5 and a downwardly extending arm connected to an adjustable rod 29.

The carriage C is formed of a U-shaped piece of sheet metal as shown inFig. 2 having a verl tical wall 39 and top and bottom horizontal flanges3| and 32, respectively. The left end of the wall 3c as seenA in Fig. 1has a bearing 33 secured thereto and located between ears 34 on theactuator IS. The post I5 passes through the ears and bearing to guidethe actuator and carriage for vertical movement. The right hand end ofwall 30 has secured thereto a block 35 to which is pivoted a lever Bsimilar to lever 26 and having a depending arm connected to rod 29. Asubstantially horizontal arm 3l of lever 3S vbears against a hook 38pivoted at 39 on the angle bracket II. The two levers 20 and 36 arepreferably alike so that as actuator I6 rises and falls the carriage Cwill also rise and fall.

A leveler L is fitted inside the carriage and has a horizontal flange 46parallel to flange 3i and a vertical wall 4l parallel to carriage wall39. In order that the leveler may be moved in a vertical directionrelatively to the carriage the latter has pivoted thereto two links 45which are jointed at 4B to other links 41. The lower end of each link 41is pivoted on a pin 43 secured to the wall 4I and movable vertically ina slot 49 in the wall 30. A link 59 is connected to the joints 46 andhas a handle 5| which is normally in the left hand position shown inFig. 1 with the leveler up.

The carriage is provided with two parallel rows of pattern readers Rextending lengthwisey of the carriage. Each reader has a vertical stem551the top of which extends through and above the anges 3l and 40. Astop collet 56 on each reader is provided for engagement with the flange49 and a second collet 51 on each reader receives the upward thrust of acompression. spring 58 which surrounds the stem and lies between thecollet 51 andthe flange 32. The bottom of eachstern extends into aperforation in theange 32 and may project below the` latter. The readersare therefore slidable vertically on the carriageY and relatively to theleveler.

Under ordinary operating conditions the parts are in the position shownin Fig. 2` with the springs 58 exerting an upward force on their :1;

to the right as viewed in Fig. 1 to cause the links 45 and 41 to alignand effect downward movement of the.leveler. so.. that its iiange 40will be spacedy below the ange 3.| to lower all the readers; A stop onwall 30 engages one of the links after. the latter have passedslightlybeyond alignment to hold the leveler yieldingly locked in low position.When the leveler is down` the tops of the pattern readers extend aslight distance above the ange 3| whilethe bottoms of the readers extendfarther below theange 32 than normally, assuggested inFig...3.

Thematter thus far described may be constructed either as set forth inmy co-pending application previously mentioned or inV copendinglapplication Serial No.Y 427,318; now Patent No.4 2,305,386, to1 whichVreference may be had for a further understanding of the. structureV andits operation. It is .believed to be sui'cientfor present purposestostate that when the dobby is to be usedY for itsA full capacity all oftheY pattern readers willbe employed, but when a narrow pattern sheet issufficient it is desirable to disable or render inactive` those patternreaders which are beyond or out of alignment with the narrow pattern`sheet.

In carrying mypresent invention into effect I provide al guard 15 whichcan be readily applied tothe carriage to hold down'those readers whichare .out of registery with 4the narrow paper pattern.

This guard may conveniently be made of sheet metal and comprises anupright body 16 from which extend top and. bottom lateral flanges 11 and18, respectively. The top flange has the rear edge thereof bentdownwardly and toward' the body 16 to form a web 19 having an inclinedcam surface for a purpose to be described. Two short ears 80 extend fromthe bent web 19 toward the body 16 for engagement with certain of thereaders. The bottom flange 18 is provided with an elongated slot 82slightly wider than the space occupied by the two rows of readers. Theiiange 18 has end guides 84 at the end of the slot 82 which connect thebody 16 with a bar 85 adapted to extend behind the rear row of readers.

When the dobby is to be converted for use from a Wide pattern to anarrow pattern the leveler will be depressed to lower all of the readersto the position shown in Fig. 3. The guard then has the lower flangethereof fitted around the bottoms of those readers which are to bedisabled so that they enter the slot 82 with the bar 85 extending behindthe readers remote from the body 16. The guard is then raised until itslower flange is adjacent to the bottom ange of the carriage, afterwhichthe upper iiange 11 is moved to the right to the position shown in Fig.4. The inclined web 19 acts as a cam to effect a further depression ofthe selected readers and the flange 11 is of such width that the edge ofthe web 19 adjacent to the body 15 will be located behind the right rowof readers 40 as viewed in Fig. 4. The fingers 80 engage the adjacentdepressed readers to prevent transverse movement of the guard and holdthe latter in operative position with respect only to those readerswhich are to be held depressed.

The leveler is then raised for normal operation and the springs of thedepressed readers push the latter upwardly against the iiange 11. The

.. latter is so related to the length of the readers,

the bottom iiange 18, and the carriage that the lower ends of thereaders will extend below the flange 18 when the latter has been liftedagainst the bottom flange of the carriage by the upward thrust of thesprings corresponding to the disabling plungers. The guard is thus heldin position by the springs and is prevented from movement to the rightas viewed in Fig. 4 by the top and bottom flanges of the carriage andheld against movement to the left as viewed in that iigure by the righthand row of readers engaging web 19.

It should be noted that the leveler when fully down permits the upperends of the readers to extend slightly above the bottom of the web 19when the guard is in operating position. The purpose of thisrelationship is to permit the leveler to be lowered for manipulation ofthose readers which are to remain in action without danger that thedisabled readers will release the guard.

From the foregoing it will be seen that I have provided simple means fordisabling certain of the pattern readers when pattern sheets are used ofless width than the maximum capacity of the dobby. It will be seen thatthe guard cooperates with parts of the readers not only to disable thelatter but to be held by them in position so that no additional holdingmeans is needed. It will further be seen that the anges of the guard areso constructed that the springs serve normally to hold the guard inproper position. Also, the cam surface on web 19 eiects a slightdepression of the reader when moving from the position of Fig. 3 to thatof Fig. 4, after which the disabled readers rise slightly Ibutsuiiciently to hold the guard in position.

Having thus described my invention it will be seen that changes andmodications may be made therein by those skilled in the art withoutdeparting from the spirit andl scope of the invention and r do not wishto be limited to the details herein disclosed, but what I claim is:

1. In a dobby capable of operating with sheet pattens of diierent widthsand having a set of hook lifters, a plurality of pattern reading membersarranged transversely of the sheet pattern capable of cooperating withthe whole set of lifters, a narrow sheet pattern being aligned with apart only of said members, means to move all of said members towardtheir respective lifters, for a pattern reading operation of the dobby,and stop means to prevent cooperation of those members out of alignmentwith the sheet pattern with their respective lifters.

2. In a dobby operating with hook lifter elements, a plurality ofcontrol members for said elements, one member for each element, a sheetvpattern located between certain only oi said members and theircorresponding lifters, means to move all of said members toward theircorresponding lifters, and means positioned by the remainder of saidmembers out of alignment with the sheet pattern to prevent cooperationoperation of the dobby when said certain members move toward theirelements, and means held in such position by the remainder of said r*members as to prevent the latter from cooperating with their respectiveelements during a pattern reading operation of the dobby.

4. In a dobby operating with harness hook lifter elements, a set ofelement operating members, one member for each element, means to moveall of said members toward their respective elements, a sheet patternlocated between certain only of said members and their correspondingelements to control a pattern reading operation of the dobby when saidcertain members move toward their elements, and means to Iprevent theremainder of said mem-bers from cooperating with their respectiveelements, during a pattern reading operation of the dobby, said meansbeing located between said remainder of the members and theircorresponding elements.

5. In a loom dobby having pattern readers mounted on a carriage movabletoward and from a sheet pattern to present the readers to the pattern,said dobby being usable with wide and narrow patterns, .each readercomprising a rod member and a spring urging the rod member to moverelatively to the carriage toward the pattern, a guard for the unusedreaders when a narrow pattern is employed, said guard including a partto engage the unused readers and hold the same depressed with respect tothe carriage, and said guard having other parts to engage the unusedreaders and be held by the latter againstJ i'.

lateral displacement relatively to the carriage, the springs of theunused readers holding the latter in position to engage the guard.

6. In a loom dobby usable with wide and narrow sheet patterns and havingpattern readers lil a narrow pattern is employed, said guard including apart to engage the unused readers and hold the latter depressed withrespect to the carriage, said guard having a bar to engage the lowerends of the unused readers to prevent lateral movement of the lower partof the guard relatively to the carriage and said guard having anotherpart to engage the upper .ends of the depressed readers to preventdisplacement of the upper part of the guard laterally with respect tothe carriage, the springs of the unused carriers holding the latter inposition for engagement with the upper part of said guard.

7. In a loom dobby usable with wide and narrow sheet patterns andhavingpattern readers mounted on a carriage under vthe sheet pattern andmovable to present the readers to the pattern, each reader comprising arod member and a spring urging the rod member to move upwardlyrelatively to the carriage toward the pattern, a guard for the unusedreaders when a narrow pattern is employed, said guard having a slot inthe lower part thereof to receive the bottoms of the depressed unusedreaders and having a part at the upper end thereof to engage the unusedreaders and hold the latter depressed with respect to the carriage, andmeans on the guard to engage the upper ends of the depressed readers toprevent lateral movement of the upper end of the guard relatively to thecarrier.

8. In a loom dobby usable with wide and narrow sheet patterns and havingpattern readers mounted on a carriage under and movable toward and fromthe sheet pattern to present the readers to the pattern, each readerincluding a spring urging the reader to move upwardly relatively to thecarriage toward the pattern, a guard for the unused readers when anarrow pattern is employed, said carriage having top and bottom ilangesthrough which the readers extend, a body forming part of the guard andextending between and engaging said flanges to limit movement of theguard laterally with respect to the carriage in one direction, otherparts on the guard to engage the unused readers to prevent lateralmovement of the guard in the opposite direction relatively to thecarriage, and said guard having means to hold the unused readers indepressed position relatively to the carriage,

9. In a loom dobby having pattern readers mounted on a carriage belowand movable toward and from the sheet pattern to present the readers tothe pattern, said dobby being usable with wide and narrow patterns, eachreader comprising a rod member and a spring urging the rod member tomoveupwardly relatively to the carriage toward the pattern, a guard for theunused readers when a narrow pattern is employed, spaced flanges on saidcarriage through which the readers extend, the guard having a part toengage the unused readers and hold the latter depressed with respect tothe carriage, and said guard having a part which is held against one ofsaid anges by a force derived from the springs of the depressed rodmembers to limit upward movement of the guard relatively to thecarriage, said flanges preventing lateral movement of the guard withrespect to the carrier in one direction and said guard having parts toengage the depressed readers to prevent lateral movement of said guardrelatively to the carrier in the opposite direction.

l0. In a loom dobby usable with Wide and narrow sheet patterns andhaving pattern readers mounted on a carriage under and movable towardand from the sheet pattern to present the readers to the pattern, eachreader including a spring urging the reader to move upwardly relativelyto the carriage toward the pattern, a guard for the unused readershaving a lower part to engage the carriage to prevent upward movement ofthe guard relatively to the carriage, mutually engaging parts on saidcarriage and guard to prevent movement oi the latter laterally of thecarriage in one direction, parts on said guard to engage the unusedreaders to prevent movement of the guard laterally of the carriage inthe opposite direction, and a part on said guard to engage the tops ofthe unused readers to hold the latter depressed relatively to thecarriage, the springs of the depressed readers exerting a force on thelast named part transmitted through the depressed readers tending toresist downward movement of the guard relatively to the carriage.

11. In a loom dobby having pattern readers mounted on a carriage movabletoward and from a sheet pattern Ato present the readers to the pattern,said dobby being usable with wide and narrow patterns, each readerincluding a spring urging the reader to move relatively to the carriertoward the pattern, a guard for the unused readers when a narrow patternis employed, said guard having a part to engage the unused readers andhold the latter depressed with respect to the carriage, a leveler todepress all of the readers with respect to the carriage to a givenlevel, and means on the guard positioned to engage the unused readersand be held by the latter against lateral movement relatively to thecarrier when the leveler moves all of said readers to said given level.

12. A guard for pattern readers tending to move relatively to a carriagetherefor toward the sheet pattern of a loom, said guard including avertical body and two spaced laterally projecting anges, one to extendover the readers to hold the latter depressed relatively to the carriageand the other iiange to engage the carriage to limit movement of theguard relatively to the carriage toward said sheet pattern, both of saidiianges having parts to engage the readers to prevent lateral movementof the guard relatively to the carriage.

13. A guard for the pattern readers of a carriage movable toward andfrom the sheet pat,- tern `of a loom, saidV readers being resilientlymounted on the carriage to move toward the sheet pattern, said guardhaving a vertical body and a flange extending laterally from the bottomof the body to engage the carriage and provided with a slot to receivethe pattern readers, a second flange extending laterally from the upperend of the body to extend over and hold the pattern readers depressedrelatively to the carrier, said second flange having a part to engagethe depressed readers to prevent lateral movement of the guardrelatively to the carrier.

14. A guard for the pattern readers of a carriage movable toward andfrom the sheet pattern of a loom, said readers being resiliently mountedon the carriage to move toward the sheet pattern, said guard having avertical body, a flange extending laterally from the bottom of the bodyfor engagement with the under side of the carriage and the lower ends ofthe readers, a second flange extending laterally from the body over therst named flange for engagement with the upper ends of the patternreaders to hold the latter depressed relatively to the carriage, thesecond named ange having the edge thereof remote from said body benttoward the first named iiange and said body to provide an inclinedsurface for the depression of the readers when the guard is moved intoposition on the carriage.

RICHARD G. TURNER.

